"A Christmas Melody" revolves around Kristin (Lacey Chabert), a beautiful, stylish divorcee who is a talented clothing designer and her young daughter, Emily (Fina Strazza). Kristin has just had to close her small Manhattan boutique to return to her Ohio home town and live in her parents' former home. It's an adjustment for Kristin and Emily - especially when she runs into her former high school rival Melissa (Mariah Carey). Melissa is president of the PTA and tries to make Kristen feel as unwelcome as possible. Kristen and Emily struggle to find their new normal with the help of the hunky local music teacher Danny (Brennan Elliot) and coffee shop owner Sarah (Kathy Najimy).